Material Code Application Temp erature Wear Resistance Available Forms Nitrile none General purpose petroleum fluids ethylene glycol water small amounts of methanol 30 to 200 F ID: 674630
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Diaphragm, Seat, and O-Ring Materials
Material
Code
Application
Temp
erature
Wear
Resistance
Available Forms
Nitrile
(none)
General purpose,
petroleum fluids, ethylene glycol, water, small amounts of methanol
-30° to +200° F
1
O-Rings, Seats, Diaphragms
Polyacrylate
H
Heat resistance, oils, natural gas
0° to +300° F
.5
O-Rings, Seats, Diaphragms
Ethylene
Propylene
EP
Steam, water,
alcohols
-65° to +300° F
1.5
O-Rings,
Seats, Diaphragms
Highly Saturated
Nitrile
HSN
Petroleum fluids, H
2
S, CO
2
-20° to +300° F
2
O-Rings, Seats, Diaphragms
Polyurethane
P
Petroleum fluids,
CO
2,
abrasion, toughness
-40° to +200° F
5
Seats, 106P Diaphragm
Viton®
V
Heat, acids, propane gasoline,
no methanol, not for hot water or steam, not for wet CO
2
-15° to +350° F
.75
O-Ring, Seats, Diaphragms
Geothermal
EPDM
GEP
Steam,
water, petroleum fluids
0° to +500° F
1.5
Seats HPMV PB
Aflas
®
AF
High heat, steam,
amine, acids, bases, petroleum fluids, no methanol
25° to +450° F
3
O-Rings,
Seats
Gylon
®
3521
GY
High
heat, high chemical resistance, highly resistant to gas permeation
-350° to +500° F
4
Seats, Diaphragms
Low Temp Nitrile
LTN
Petroleum, low temperature
-65° to +225° F
1
O-Rings, Diaphragms
Multi-Nylon
MN
Petroleum,
abrasion, water, steam
100° to +250° F
5
Seats